JSFiddle - React, Tailwind, and code Playground

HTML

<button>Let's go</button>

<div class="announcement">
   <span>Breaking news: I love jQuery...</span>
</div>

CSS

.announcement {
    display: none;
    background: yellow;
    margin-top: 40px;
    font-size: 24px;
    padding: 6px;
}

JavaScript

$('button').click(function() {
    $('.announcement').toggle();
});